The invention relates to a protection device and method for preventing a power battery from being overcharged and overdischarged and a vehicle. According to the collected real-time data, the allowable charging and discharging power of a power battery is calculated through an intelligent algorithm, and when it is detected that the power required by a driver exceeds the allowable charging/discharging power, the target execution torque needing to be executed and sent by a vehicle control unit to a motor controller is restrained through a control algorithm; on one hand, actual power is calculated through current and voltage values fed back by a battery management system in real time, demand power closed-loop adjustment is carried out through a difference value between the actual power and demand power, and the difference between a target value and an actual value is continuously reduced; on the other hand, the open-loop protection threshold value is increased, so that an over-charge or over-discharge fault caused by unexpected load or motor efficiency deviation is prevented; over-charging and over-discharging are prevented, the safety of the power battery can be improved, thermal runaway is prevented, and the service life of the power battery is prolonged.
本发明涉及一种防止动力电池过充和过放保护装置、方法及车辆;根据采集的实时数据,采用智能算法计算动力电池许用充电和放电功率,当检测到驾驶员需求功率超过许用充/放电功率时,通过控制算法约束整车控制器发给电机控制器的需要执行的目标执行扭矩;一方面,通过电池管理系统实时反馈的电流和电压值计算实际功率,通过实际功率和需求功率之间的差值进行需求功率闭环调整,不断缩小目标值和实际值之间的差异;另一方面,通过增加开环保护阈值,防止非预期负载或电机效率偏差导致的过充或过放故障;本发明防止过充和过放的发生,能够提高动力电池安全性,防止热失控的发生以及提高动力电池寿命。
Protection device and method for preventing over-charge and over-discharge of power battery and vehicle
一种防止动力电池过充和过放保护装置、方法及车辆
2024-07-19
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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